AM I PREGNANT ??

Can someone give me help? I missed my period for the first time ever and it’s gonna be seven days late tomorrow. I’ve had sex with my boyfriend but we didn’t use a condom and I’m not on birth control.. he used the pull out method. I don’t have any other symptoms and I was incredibly stressed the past two weeks. I also took two tests and both were tested negative. But I don’t even have cramps or pms that start my periods regularly, no spotting either. Thoughts? Advice? Help? I’m only 16 years old. I don’t want to be pregnant.